Here is an excerpt:
"They argued that, essentially, the mind and the self are extended to those devices that help us perform what we ordinarily think of as our cognitive tasks," Lynch says. This can include items as seemingly banal and analog as a piece of paper and a pen, which help us remember, a duty otherwise performed by the brain. According to this philosophy, the shopping list, for example, becomes part of our memory, the mind spilling out beyond the confines of our skull to encompass anything that helps it think.
"Now if that thought is right, it's pretty clear that our minds have become even more radically extended than ever before," Lynch says. "The idea that our self is expanding through our phones is plausible, and that's because our phones, and our digital devices generally—our smartwatches, our iPads—all these things have become a really intimate part of how we go about our daily lives. Intimate in the sense in which they're not only on our body, but we sleep with them, we wake up with them, and the air we breathe is filled, in both a literal and figurative sense, with the trails of ones and zeros that these devices leave behind."
This gets at one of the essential differences between a smartphone and a piece of paper, which is that our relationship with our phones is reciprocal: We not only put information into the device, we also receive information from it, and, in that sense, it shapes our lives far more actively than would, say, a shopping list. The shopping list isn't suggesting to us, based on algorithmic responses to our past and current shopping behavior, what we should buy; the phone is.
The info is here.